Study of Life Classification What variety What similarity

Study of Life Classification

What variety! What similarity! § Diversity of Life u u there are so many different creatures on Earth why are there differences? § Unity of life u all creatures have similarities common characteristics u why are they so alike? u

Organizing the world of organsims § The Tree of Life u organize creatures by structure & function § how they are built § how they live u organize them into groups of closely related creatures

Eukaryote Classification § 6 Kingdom system u Prokaryotes § No separate organelles in their cells § Bacteria § Archaebacteria u Eukaryotes § Separate organelles in their cells § Protists § Plants § Fungi § Animals Bacteria & Archaebacteria

Prokaryotes Kingdom Bacteria Kingdom Archaebacteria Kingdom Protist Eukaryotes Kingdom Fungi Kingdom Plant Kingdom Animal

Classification § Kingdom § Phylum § Class § Order § Family § Genus § species

Organizing systems § Making sense out of the differences Eastern gray squirrel Sciurus carolinensis

Prokaryotes § Bacteria one-celled organisms u microscopic u no organelles u § have cell membrane § have DNA most common form of life on Earth u incredible number of different kinds u

Bacterial diversity rods and spheres and spirals… Oh My!

Both Good & Bad… § Pathogens u cause disease § infections § Beneficial & necessary help in digestion u help plants grow u make foods u

Archaebacteria § Ancient bacteria u live in extreme environments § high heat § high salt u the most ancient creatures living on Earth today

Bacteria live EVERYWHERE § On plants & animals § In the soil § In the extreme cold § In the extreme hot § On the living § On the dead

Any Questions? ?